NVIDIA has had problems over the last few years with some of its GPUs being defective. This was a widespread issue in 2008 and 2009 with GPUs failing in notebooks from HP, Dell, and Apple. Throughout the entire class action against NVIDIA, the company has maintained its innocence in the issue with the machines.
NVIDIA has finally agreed to a settlement with the company makers and consumers who purchased notebooks with defective MCPs and GPUs. The settlement terms are different depending on the machines. Owners of Dell and Apple notebooks that are affected will get a replacement GPU.